<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script type="text/javascript">
			var student = {};
			student.id = 1;
			student["name"] = "张方";
			student.age = 19;
			student["id"] = 100; 
			document.write(student.id + "<br />" + student.name + "<br />" + student.age);
		</script>
	</head>
	<body>
	</body>
</html>